Handheld Tools

Abstract

The present invention relates to a handheld tool, comprising a head shell and a handle shell, wherein a battery pack mounting portion is provided at one end of the handle shell away from the head shell; a motor is provided in the head shell, has a motor shaft and outputs rotational power; a main shaft is coaxially arranged with the motor and is at least partially located in the head shell, and is used to drive a working head connected thereto to rotate; a battery pack is arranged in a longitudinal shape, removably connected to the battery pack mounting portion, has a mounting end matched with the battery pack mounting portion and a battery pack bottom plane opposite to the mounting end; a shield is connected to the head shell and is used to cover at least part of the working head; the battery pack mounting portion is provided with a mounting surface, and the battery pack can be slidably matched with the mounting surface, and a gripping portion axis is provided on the handle shell, and the gripping portion axis is inclined relative to the mounting surface, and the longitudinal axis of the battery pack is perpendicular to the motor shaft axis in a non-planar manner.

Description

Technical Field

[0001] The present invention relates to a power tool, in particular to a handheld tool. Background Art

[0002] Handheld tools, such as traditional angle grinders, usually have a motor installed in the handle for better control of the operating balance, and an output shaft installed in the head shell. The output shaft is arranged perpendicular to the motor shaft, and power is transmitted between the two through a pair of angular gears to drive the working head connected to the output shaft for cutting or grinding.

[0003] There is a small direct-drive angle grinder on the market. The motor is located in the head shell and is coaxial with the output shaft. The motor is used to directly drive the output shaft to rotate. One end of the handle is connected to the head shell, and the other end is connected to the battery pack. The battery pack is detachably connected to the handle in a plug-in manner. When connected to the handle shell, part of the battery pack is housed in the handle shell, and part is exposed from the handle shell.

[0004] Although the handle housing of the aforementioned small direct-drive angle grinder no longer houses a motor, the internal space must accommodate the battery pack. Therefore, the size of the handle grip 23 is also affected by the size of the battery pack and its shape. This is crucial for designing a thin handle that is suitable for operation and grip, and affects the grip comfort during operation. The battery pack provides the operating energy for the handheld tool, and battery packs that can provide sufficient energy for the tool are highly desirable. Therefore, the battery pack design is not solely based on the fit of the handle housing; rather, the appropriate battery pack and tool compatibility are selected based on the battery pack's own performance and a company's overall battery pack design platform.

[0005] The way the battery pack fits into the handle housing directly affects the weight of the tool, which in turn affects grip comfort and balance. It also affects storage when the tool is not in use. The aforementioned small angle grinder cannot stand upright on a horizontal surface using the battery pack as a support surface. It must be supported by the bottom of the tool head and the bottom of the handle, which makes it difficult for the operator to directly grasp the tool when using it again. Summary of the Invention

[0006] The invention provides a handheld tool that is comfortable to operate and hold.

[0007] The technical solution of the present invention is a handheld tool, comprising: a housing, including a head shell, and a handle shell arranged at an angle to the head shell, a battery pack mounting portion being provided at one end of the handle shell away from the head shell; a motor, arranged in the head shell, having a motor shaft and outputting rotational power; a main shaft, having no relative rotational connection with the motor shaft and directly driven by the motor shaft, the main shaft at least partially extending out of the head shell for matching with a working head; a battery pack, arranged in a long strip extending along a longitudinal axis and removably connected to the battery pack mounting portion; a shield connected to the head shell for covering at least part of the working head; a grip portion being provided on the handle shell, the grip portion having a longitudinally extending grip portion axis, the battery pack having a mounting end matching with the battery pack mounting portion and a battery pack bottom plane opposite to the mounting end, the grip portion axis being arranged at an angle to the battery pack bottom plane, and the longitudinal axis being skewed and perpendicular to the motor shaft axis.

[0008] In one embodiment, the grip axis intersects the bottom plane of the battery pack at an angle. The battery pack has a first end and a second end disposed opposite each other in the longitudinal direction, the first end being able to slide relative to the second end and first inserted into the battery mounting portion, and the first end being closer to the motor shaft than the second end.

[0009] In one embodiment, the inclination angle between the axis of the grip portion and the bottom plane of the battery pack is between 100 and 120 degrees.

[0010] In another optional embodiment, the inclination angle between the axis of the grip portion and the bottom plane of the battery pack is between 105 and 115 degrees.

[0011] In one embodiment, the handle housing is connected to the middle portion of the head housing, and the handle housing and the head housing form a T-shape. The axis of the grip portion passes through the head housing and the battery pack. The length of the grip portion is set between 85 mm and 115 mm.

[0012] The working head is an annular member, the diameter of which does not exceed 100 mm. In one embodiment, the diameter of the annular member is between 50 mm and 100 mm. The working head is a cutting disc or a grinding disc, the axial dimension of the grinding disc being larger than the axial dimension of the cutting disc.

[0013] The present invention provides an ergonomic handheld tool.

[0014] The technical solution of the present invention is a handheld tool, comprising: a housing, including a head housing, and a handle housing arranged at an angle to the head housing, wherein a battery pack mounting portion is provided at one end of the handle housing away from the head housing; a motor, disposed within the head housing, having a motor shaft and outputting rotational power;

[0015] A main shaft has no relative rotational connection with the motor shaft and is directly driven by the motor shaft, and the main shaft at least partially extends out of the head shell for matching with the working head; a battery pack is configured as an elongated strip extending along the longitudinal axis and is removably connected to the battery pack mounting portion; a shield is connected to the head shell for covering at least part of the working head; the battery pack mounting portion is provided with a mounting surface, and the battery pack can be slidingly matched with the mounting surface, and a grip portion is provided on the handle shell, and the grip portion has a longitudinally extending grip portion axis, and the grip portion axis is inclined relative to the mounting surface, and the longitudinal axis of the battery pack is perpendicular to the motor shaft axis.

[0016] The present invention also provides a handheld tool that is suitable for gripping in a storage state.

[0017] The technical solution of the present invention is a handheld tool, comprising: a motor, having a motor shaft and outputting rotational power; a head shell, for accommodating the motor and at least part of the output shaft directly driven by the motor shaft; a handle shell, for accommodating a switch and a control device electrically connected to the switch and having a longitudinally extending handle axis; a working head, connected to the output shaft; a shield, connected to the head shell, for covering at least part of the working head coupled to the output shaft; a battery pack, removably connected to the battery pack mounting portion, having a mounting end coupled to the battery pack mounting portion and a battery pack bottom plane opposite to the mounting end; the head shell and the handle shell are arranged in a T shape, the handle axis obliquely intersects the battery pack bottom plane and passes through the head shell, and the projection of the center of gravity of the handheld tool to the plane where the battery pack bottom plane is located falls within the contour line of the battery pack bottom plane, so that the battery pack bottom plane can support the handheld tool upright on a horizontal plane.

[0018] The present invention adopts a reasonable layout of the head shell, handle shell and battery pack, so that the handheld tool can be upright supported on a horizontal plane with the flat bottom of the battery pack as a support, making it easy to grasp and comfortable to operate during intermittent work; and due to the miniaturization of the working head and the gripping part, the user can hold it lightly and operate it effortlessly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the handheld tool body and the battery pack in the separated state according to the first embodiment of the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional exploded view of the main body of the handheld tool

[0021] Figure 3 yes Figure 1 Schematic diagram of a handheld tool viewed from above.

[0022] Figure 4 yes Figure 1 Schematic diagram of the working status of the handheld tool.

[0023] Figure 5 yes Figure 1 Schematic diagram of a handheld tool in an upright storage position when not in use.

[0024] Figure 6 yes Figure 1 Schematic diagram of the structure of the handheld tool after removing part of the shell in the rear view direction.

[0025] Figure 7 Yes Figure 6 Schematic cross-sectional view in the AA direction.

[0026] Figure 8 It is a three-dimensional schematic diagram of the tool body and the battery pack in the separated state according to the second embodiment of the present invention.

[0027] Figure 9 yes Figure 8 Schematic diagram of the tool body and battery pack after connection.

[0028] Figure 10 3D is a perspective schematic diagram of a tool body and a battery pack separated from each other according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] Reference Figure 1 、 Figure 2 、 Figure 6 As shown in the embodiment of the present invention, the handheld tool is a small angle grinder, the housing includes a head housing 10 and a handle housing 20 connected to the head housing 10; wherein the head housing 10 is provided with a motor 5, the handle housing 20 is provided with a switch 4, a control board 2 electrically connected to the switch 4 and the motor 5, and an electrode holder 25. The motor 5 is used to output rotational power and has a motor axis Y, a spindle 52 ( Figure 7 ) is coaxially arranged with the motor 5 and at least partially located in the head shell 20 for driving the working head 6 ( Figure 4 The shield 15 is connected to the head housing 10. In this embodiment, the shield 15 is movably supported on the head housing 10 and can be rotated around the axis Y of the motor within a preset angle range to cover at least a portion of the working head connected to the output shaft.

[0031] The handle housing 20 is configured to be longitudinally elongated with a longitudinally extending handle axis X. One end of the handle housing 20 is connected to the head housing 10, and the other end of the handle housing 20 is away from the head housing 10 and is provided with a battery pack mounting portion 28. The head housing 10 is provided with a connecting portion 14 on one side close to the handle housing and approximately in the middle along the motor axis Y. The handle housing 20 is connected to the head housing 10 via the connecting portion 14. The handle housing 20 and the head housing 10 are arranged in a T-shape. The grip portion 23 is located on the handle housing 20. The axis of the grip portion 23 is coaxial with the handle axis X and passes through the head housing 10. A trigger button 201 is movably provided on the grip portion 23 near the connecting portion 14 for controlling the start and stop of the switch 4. A slide rod 202 connected to the trigger button 201 is provided in the handle housing 20. The trigger button 201 of this embodiment is provided at the top of the handle housing 20 and can slide relative to the handle housing 20 along the handle axis X, driving the slide rod 202 to move, thereby triggering the switch 4, the trigger button 201. The trigger button 201 is pivotally connected to the slide bar 202. When the trigger button 201 moves to the position of the trigger switch 4, it can be further pressed down and pivoted relative to the head shell 10 so that the lower end surface of the trigger button 201 can engage with the limiting portion (not shown in the figure) of the head shell 10 to lock the trigger button 201 on the head shell 10, thereby keeping the switch 4 in a normally closed state and allowing the motor 5 to continue to run, eliminating the need for the operator to long press the trigger button 201 during operation.

[0032] The other end of the handle housing 20 opposite to the battery pack mounting portion 28 is provided with at least one positioning portion 24 arranged along the circumference of the handle housing 20, and an extension arm 22 extending toward the head housing 10, and the free end of the extension arm 22 is provided with a clamping portion 22a. The connecting portion 14 of the head housing 10 is provided with at least one coupling member 13 that is matched with the positioning portion 24, and a receiving groove 12 for receiving the extension arm 22, and the end wall of the receiving groove 12 is provided with a pressing portion 12a for snapping with the clamping portion 22a. Among them, the head housing 10 is composed of a pair of upper and lower half-type head housings 11 distributed along the axis Y of the motor. The handle housing 20 is composed of a pair of left and right half-type handle housings 21 distributed along the axis X of the handle.

[0033] In this embodiment, the positioning portion 24 is specifically configured as a slot 24a, and the engaging member 13 is configured as a protrusion that can engage with the groove 24a. Of course, the slot 24a of the positioning portion 24 can be replaced with the protrusion 13a, and the engaging member 13 can be replaced with the slot 24a to achieve the same effect. The slot 24a and the protrusion 13a can also be replaced with other structures that can position the handle housing 20 and the head housing 10, such as pins, holes, etc., which will not be described in detail in this invention.

[0034] The left and right half-handle housings 21 are respectively provided with a plurality of slots 24 a , the upper and lower half-head housings are respectively provided with protrusions 13 a corresponding to the slots 24 a , and the pressing portion 12 a is only provided on one of the upper and lower half-head housings 11 . When installing the casing, the following steps can be followed: provide the left and right half-type handle shells 21, and the upper and lower half-type head shells 11; connect the left and right half-type handle shells 21 together by fasteners such as screws; dock the slot 24a of the connected handle shell 20 with the protrusion 13a of one of the upper and lower half-type head shells 11 that does not have the pressing portion 12a; dock the protrusion 13a of the half-type head shell 11 with the pressing portion 12a with the slot 24a of the handle shell 20, so that the pressing portion 12a is snapped together with the clamping portion 22a at the free end of the extension arm 22; and then connect the upper and lower half-type head shells 11 together by fasteners.

[0035] The battery pack mounting portion 28 includes a concave cavity provided at the end of the handle housing 20, and the concave cavity is surrounded by a roughly U-shaped sole wall, which is formed by the handle housing 20 being bent outward at a certain angle and then extended, and the outer dimensions of the sole wall are slightly larger than the outer dimensions of the handle housing 20. The two parallel side walls of the U-shaped sole wall are bent inward from the bottom to form a pair of slide rails 27. The battery pack 30 of this embodiment has a mounting end 32 that matches the battery pack mounting portion 28 and a battery pack bottom plane 36 opposite to the mounting end 32, wherein the mounting end 32 includes a pair of slide grooves 34 (only one is shown) for matching with the slide rail 27. A mounting surface 26 is provided on the slide rail 27 for abutting against the top wall 34a of the slide groove 34. An electrode sheet 25a extending toward the U-shaped opening is provided in the concave cavity for electrically connecting to the electrode end (not shown) of the battery pack 30. The battery pack 30 is slidably inserted into the battery pack mounting portion 28 along the direction indicated by arrow R from the U-shaped opening of the cavity and engages with the mounting surface 26 , and the battery pack 30 can be removed from the slide rail 27 along the opposite direction indicated by arrow R.

[0036] Reference Figure 3 As shown, the working head 6 of the small angle grinder of this embodiment is configured as an annular member, the diameter of which does not exceed 100 mm. Preferably, the diameter can be selected between 50 mm and 100 mm. The working head 6 is a circular cutting disc or a circular grinding disc, respectively used for cutting or grinding. Depending on the actual working conditions, the working head 6 can be replaced between the circular cutting disc and the circular grinding disc. The circumferential outer edge of the circular cutting disc does not have serrations, and therefore is different from a circular saw blade. The length L1 of the grip portion 23 of the handle housing 20 is suitable for the width of the operator's palm, and is between 85 mm and 100 mm.

[0037] Further references Figure 4As shown, when the operator holds the gripping portion 23 of the tool to perform cutting operations on the workpiece W, the working head 6 contacts the surface of the workpiece W. In order to avoid interference between the battery pack 30 connected to the rear side of the handle housing 20 and the surface of the workpiece W during operation, the gripping portion 23 needs to be slightly lifted toward the side close to the operator's arm, that is, the gripping portion 23 is slightly tilted upward. According to the operator's operating habits, the distance h from the bottom edge of the battery pack 30 to the surface of the workpiece W is generally reserved at 5 to 20 mm, which is the most comfortable and labor-saving grip. If the distance h is too large, the gripping angle α is too large, causing the operator's wrist to grip the operation uncomfortably. The smaller the angle α, the less force is required to grip and the more comfortable it is. The gripping angle α is defined as the angle between the axis X of the gripping portion and the surface of the workpiece W, i.e., the horizontal plane.

[0038] The handle axis X intersects obliquely with the plane where the mounting surface 26 is located, so that when the battery pack 30 is connected to the battery pack mounting portion 28, the battery pack bottom plane 36 is roughly parallel to the mounting surface 26, and the handle axis X intersects obliquely with the bottom plane 36 of the battery pack 30 in the same manner, and the angle β between the handle axis X and the battery pack bottom plane 36 and the angle γ between the handle axis X and the plane 26 where the mounting surface 26 is located are co-angled. In this embodiment, the angle β is set in the range of 58 degrees to 78 degrees, that is, the angle γ is set in the range of 102 degrees to 122 degrees. A number of parallel batteries (not shown in the figure) are arranged in the battery pack 30, and the battery pack 30 is arranged in a long strip extending along the longitudinal axis Z, and the longitudinal axis Z is perpendicular to the motor axis Y in different planes. It has a first end 30a and a second end 30b that are arranged opposite to each other, and the first end 30a is first inserted into the battery pack mounting portion 28 relative to the second end 30b along the sliding direction, and the first end 30a is closer to the motor than the second end 30b. As Figure 4 In the operating state shown, since the second end 30b of the battery pack 30 is tilted backward toward the operator's side, the gripping space near the second end 30b is wider than the gripping space near the first end 30a. Since the operator's wrist is above the second end 30b, it can avoid interference with the battery pack 30.

[0039] In one embodiment, the battery pack 30 is slidably coupled to the battery pack mounting portion 28 along an axis substantially perpendicular to the handle axis X, and the coupled battery pack is substantially perpendicular to the handle axis.

[0040] The motor of a traditional angle grinder is set in the grip portion. In this case, the design of the radial size of the handle shell must not only consider the placement of the motor, but also consider the setting of air ducts for the heat dissipation of the motor. Therefore, the radial size of the handle grip portion must be larger than the diameter of the motor. The excessively large radial size of the grip portion often makes it difficult or laborious for the operator to grip. Since the motor 5 of the present invention is set in the head shell 10, the outer circumference of the grip portion 23 will not be affected by the size of the motor 5, so it is more conducive to designing a grip portion that is more suitable for gripping operations. After research, it was found that a suitable handle shell size, especially the circumference of the grip portion, will make the user's grip more comfortable, the grip feel strong and not easy to slip out, and it is easy to adjust the direction of the working head 6. Electric tool manufacturers have been committed to researching handheld tools that are suitable for users to hold and conform to human-machine operation. The outer circumference of the handle grip portion 23 suitable for domestic and foreign operators to grip in the present invention ranges from 109 to 157 mm. In one embodiment, the outer circumference of the handle grip portion 23 is 135 mm to 145 mm. The outer circumference of the grip portion 23 is suitable for the length of the operator's palm, and the grip portion length L1 is suitable for the width of the operator's palm.

[0041] This operating posture during operation, on the one hand, ensures the smooth progress of the cutting operation, on the other hand, is also in line with ergonomics, comfortable and labor-saving operation.

[0042] Reference Figure 5 As shown, when the handheld tool completes a single job, the operator needs to release it from the hand. In order to facilitate gripping during the next job and not occupy too much area for placing the tool, the tool of this embodiment can be placed upright on the surface of the workpiece or other flat surface with the bottom plane 36 of the battery pack as the support surface. This arrangement makes the handle shell 30 also in a slightly tilted upright state, and the operator can hold it with a stretched hand. The reason why the bottom plane 36 of the battery pack can support the tool without tipping over is that the center of gravity of the tool is designed. The shield 15 in this embodiment needs to rotate relative to the motor axis Y within a certain angle range. As the position of the shield 15 is adjusted, the center of gravity position of the tool will change accordingly. This requires that when the shield 15 is at the extreme position of the angle adjustment range, the center of gravity position can satisfy the battery pack bottom plane 36 to support the entire tool.

[0043] Since the weight of the head shell part is mainly concentrated on the motor 5, spindle, working head 6 and head shell 10 and other components; the weight of the handle shell part is concentrated on the switch 4, control panel 2 and handle shell 20 and so on. The weight of the head shell part is significantly greater than the weight of the handle shell part. Since the handle shell 20 is tilted relative to the battery pack 30, if the tilt angle is too large, the center of gravity will shift to the heavier head shell part, and the tool will not be able to stand upright. When setting the tilt angle between the battery pack 30 and the handle axis X, this embodiment not only takes into account the operator's operating habits, that is, the angle between the operator's wrist and palm when the operator is in a relaxed grip operating state, but also takes into account the influence of the tilt angle on the uprightness of the tool; in addition, if Figure 3 The handle axis X shown in the figure passes through the head shell 10 and the battery pack 30 at the same time. The handle shell 20 is connected to the connecting part 14 of the head shell 10, and the connecting part 14 is roughly located in the middle part of the head shell 10 along the motor axis Y. Therefore, the T-shaped setting of the handle shell 20 and the head shell 10 can make the center of gravity of the tool more conducive to being close to the handle axis X.

[0044] In this embodiment, when the shield 15 is in the first extreme position (shown by the solid line), the tool's center of gravity G1 is substantially located along the handle axis X. When the shield 15' is in the second extreme position (shown by the dashed line), the tool's center of gravity G2 deviates from the handle axis X and leans toward one outer edge of the battery pack 30. The projections G1' and G2' of the centers of gravity G1 and G2 onto the plane containing the battery pack's bottom plane 36 both fall within the outer contour of the battery pack's bottom plane 36, allowing the battery pack's bottom plane 36 to support the handheld tool on a workpiece surface or a horizontal plane.

[0045] Reference Figure 6 、 Figure 7 As shown, the motor 5 housed in the head shell 10 is an integral motor having a shell covering a rotor and a stator. The shell 5a of this embodiment is made of metal, and an air inlet 55 is provided on the shell 5a. A fan 501 is provided inside the shell 5a at the position corresponding to the air inlet 55. The motor 5 has a motor shaft 51, and the main shaft 52 is non-rotatably connected to the motor shaft 51 and is coaxially arranged with the motor shaft 51. The main shaft 52 is directly driven to rotate by the motor 5. A positioning member 56 is fixedly provided on the end face of the shell 5a close to the main shaft 52, and a clamping portion 16 corresponding to the positioning member 56 is provided in the head shell 10. The positioning member 56 is connected to the clamping member without relative rotation so that the shell of the motor 5 cannot be rotated relative to the head shell 10 and is arranged in the head shell 10. The spindle 52 is supported by a pair of bearings arranged parallel to the head shell 10. The end of the spindle 52 extending from the head shell 10 is configured as a central shaft section with internal threads and an inner pressure plate 57. The pressure plate screw includes a screw with external threads and an outer pressure plate 58. The working head 6 is fixed between the inner pressure plate 57 and the outer pressure plate 58 by the pressure plate screw. The shield includes a main shield 15a connected to the head shell 10 and a secondary shield 15b detachably connected to the main shield 15a.

[0046] A shaft lock mechanism 40 for locking the spindle 52 relative to the head shell 10 is provided near the trigger button 201 on the head shell 10. This mechanism is used to prevent the work head from rotating with the spindle 52 and being unable to lock the work head 6 when the new work head is rotationally locked to the spindle 52 by the pressure plate screw when the work head is replaced. The shaft lock mechanism 40 includes a locking pin 42 movably arranged in a direction perpendicular to the spindle and an operating button 44 elastically supported on the top of the locking pin 42. The operating button 44 at least partially protrudes from the head shell 10, making it convenient for the operator to trigger it to drive the locking pin 42 to move toward the spindle 52 until it engages with a locking groove (not shown) fixed to the spindle 52 to lock the spindle 52 relative to the head shell 10. When the operating button 44 is released, the locking pin 42 moves in the opposite direction under the action of the elastic member until it disengages from the spindle 42.

[0047] Reference Figure 8 As shown, the battery pack 30' can be connected to the battery pack mounting portion 28a in an insertion manner in the direction indicated by the arrow R, and can be separated from the handle housing by being pulled out from the battery pack mounting portion 28a in the opposite direction to that indicated by the arrow R. The battery pack 30' is arranged in a longitudinal shape extending along the battery axis Z. The battery pack 30' has a mounting end 32a that matches the battery pack mounting portion 28a and a battery pack bottom plane 36a opposite to the mounting end 32a, and the battery pack bottom plane 36a is parallel to the battery axis Z. The battery pack mounting portion 28a is provided with a receiving groove for receiving the mounting portion 28a. The receiving groove has a pair of mounting surfaces 26a arranged in parallel, which are used to provide sliding support to the mounting portion 28a when the battery pack 30' is plugged in and out of the receiving groove. The handle axis X is arranged at an angle to the mounting surface 26a or the plane where the mounting surface is located. The mounting surface 26a of this embodiment is arranged approximately perpendicular to the battery pack bottom plane 36a. Refer to Figure 9 As shown, the bottom plane 36 a of the installed battery pack 30 ′ intersects the handle axis X obliquely, and the battery axis Z intersects the handle axis X obliquely.

[0048] Reference Figure 10 As shown, the battery pack 30" can be inserted into the battery pack mounting portion 28b in the direction indicated by the arrow R, and can be separated from the handle housing by pulling out from the battery pack mounting portion 28b in the opposite direction indicated by the arrow R. The battery pack 30' is configured to be elongated along the battery axis Z. The battery pack 30' has a mounting end 32b that matches the battery pack mounting portion 28b and a battery pack bottom plane 36a opposite to the mounting end 32b. Figure 8The difference is that, in this embodiment, the pair of mounting surfaces 26b of the battery pack mounting portion 28b are arranged roughly parallel to the handle axis X. When the mounting end 32b of the battery pack 30" is slidably mated with the mounting surface 26b, the bottom plane 36b of the battery pack 30' still intersects the handle axis X at an angle, and the battery axis Z intersects the handle axis X at an angle.

[0049] The vertical and substantially vertical mentioned in the present invention include angular deviations within a tolerance range that may be caused during the manufacturing or installation process.

[0050] The battery pack of the present invention is equipped with a locking mechanism, and the battery pack mounting portion is provided with a locking portion that cooperates with the locking mechanism. When the battery pack mounting end slides into position with the mounting surface, the locking mechanism and the locking portion automatically engage and lock. When the battery pack needs to be separated from the battery pack mounting portion, the locking mechanism is simply operated to disengage the locking portion, and the battery pack mounting end can be removed from the mounting surface. Because the design of the battery pack locking mechanism and the locking portion of the battery pack mounting portion is relatively common, the present invention does not elaborate on them in detail.

Claims

1. A handheld tool, characterized in that: include: The housing comprises a head housing and a handle housing arranged at an angle to the head housing, wherein a battery pack mounting portion is provided at one end of the handle housing away from the head housing; a motor, disposed in the head shell, having a motor shaft and outputting rotational power; a spindle, non-rotatably connected to the motor shaft and directly driven by the motor shaft, the spindle at least partially extending out of the head housing for mating with the working head; A battery pack is configured in the shape of an elongated strip extending along a longitudinal axis and is removably connected to the battery pack mounting portion; a protective cover connected to the head shell and used to cover at least a portion of the working head; The handle shell is provided with a gripping portion, and the gripping portion has a longitudinally extending gripping portion axis. The battery pack has a mounting end matched with the battery pack mounting portion and a battery pack bottom plane opposite to the mounting end. The gripping portion axis is set at an angle to the battery pack bottom plane, and the longitudinal axis is skewed and perpendicular to the motor shaft axis.

2. The handheld tool according to claim 1, wherein: The axis of the grip portion obliquely intersects with the bottom plane of the battery pack.

3. The handheld tool according to claim 2, wherein: The battery pack has a first end and a second end that are oppositely arranged in the longitudinal direction. The first end can be slidably inserted into the battery mounting portion relative to the second end, and the first end is closer to the motor shaft than the second end.

4. The handheld tool according to claim 3, wherein: The inclination angle between the axis of the grip portion and the bottom plane of the battery pack is between 100 and 120 degrees.

5. The handheld tool according to claim 3 or 4, characterized in that: The inclination angle between the axis of the grip portion and the bottom plane of the battery pack is between 105 and 115 degrees.

6. The handheld tool according to claim 1, wherein: The handle shell is connected to the middle part of the head shell, and the handle shell and the head shell are T-shaped.

7. The handheld tool according to claim 1, wherein: The axis of the gripping portion passes through the head shell and the battery pack.

8. The handheld tool according to claim 1, wherein: The length of the grip portion is set between 85 mm and 115 mm.

9. The handheld tool according to claim 1, wherein: The other end of the handle shell opposite to the battery pack mounting portion is provided with at least one positioning portion arranged along the circumference of the handle shell, and an extension arm extending toward the head shell. The side of the head shell facing the handle shell is provided with at least one coupling member matched with the positioning portion, and a receiving groove for accommodating the extension arm. A clamping portion is provided on the extension arm, and a pressing portion that engages with the clamping portion is provided on the receiving groove.

10. The handheld tool according to claim 9, wherein: The handle shell is composed of a pair of left and right half-type handle shells distributed along the axis of the gripping part, and the head shell is composed of a pair of upper and lower half-type head shells distributed along the axis of the motor.

11. The handheld tool according to claim 10, wherein: The left and right half-type handle shells are respectively provided with positioning parts, the upper and lower half-type head shells are respectively provided with engaging parts corresponding to the positioning parts, and the pressing part is provided on one of the upper and lower half-type shells.

12. The handheld tool according to claim 9, wherein: One of the clamping portion and the engaging portion is configured as a clamping slot, and the other one is configured as a protrusion matched with the clamping slot.

13. The handheld tool according to claim 1, wherein: A switch and a control device electrically connected to the switch are provided in the handle housing, and a trigger button for controlling the start and stop of the switch is provided on the handle housing.

14. The handheld tool according to claim 13, wherein: The trigger button is slidably arranged on the handle housing along the axis of the gripping portion.

15. The handheld tool according to claim 1, wherein: The working head is an annular member, and the diameter of the annular member does not exceed 100 mm.

16. The handheld tool according to claim 15, wherein: The diameter of the ring is between 50 mm and 100 mm.

17. The handheld tool of claim 15, wherein: The working head is a cutting disc or a grinding disc, and the axial dimension of the grinding disc is larger than the axial dimension of the cutting disc.

18. A handheld tool comprising: The housing comprises a head housing and a handle housing arranged at an angle to the head housing, wherein a battery pack mounting portion is provided at one end of the handle housing away from the head housing; a motor, disposed in the head shell, having a motor shaft and outputting rotational power; a spindle, non-rotatably connected to the motor shaft and directly driven by the motor shaft, the spindle at least partially extending out of the head housing for mating with the working head; A battery pack is configured in the shape of an elongated strip extending along a longitudinal axis and is removably connected to the battery pack mounting portion; a protective cover connected to the head shell and used to cover at least a portion of the working head; It is characterized in that the battery pack mounting portion is provided with a mounting surface, the battery pack can be slidingly matched with the mounting surface, the handle shell is provided with a gripping portion, the gripping portion has a longitudinally extending gripping portion axis, the gripping portion axis is inclined relative to the mounting surface, and the longitudinal axis of the battery pack is not perpendicular to the motor shaft axis.

19. The handheld tool of claim 18, wherein: The handle shell and the gripping portion are coaxially arranged, and the axis of the gripping portion passes through the head shell and the battery pack.

20. A handheld tool comprising: a motor having a motor shaft and outputting rotational power; a head housing for accommodating the motor and at least a portion of an output shaft directly driven by the motor shaft; A handle housing, for accommodating a switch and a control device electrically connected to the switch and having a handle axis extending longitudinally; a working head connected to the output shaft; a protective cover connected to the head shell and used to cover at least a portion of the working head connected to the output shaft; a battery pack removably connected to the battery pack mounting portion, having a mounting end mated with the battery pack mounting portion and a battery pack bottom plane opposite the mounting end; It is characterized in that the head shell and the handle shell are arranged in a T shape, the handle axis intersects with the bottom plane of the battery pack at an angle and passes through the head shell, and the projection of the center of gravity of the handheld tool to the plane where the bottom plane of the battery pack is located falls within the contour line of the bottom plane of the battery pack, so that the bottom plane of the battery pack can support the handheld tool upright on a horizontal plane.

Images